diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-07-22 10:55:40 +0100 |
|---|---|---|
| committer | Leon Alrae <leon.alrae@imgtec.com> | 2016-07-28 11:24:00 +0100 |
| commit | 7f81dbb9a0e89b5306c1337e0cd0e1cea8a03f6d (patch) | |
| tree | dec2a2d4cd1a42443ee3f84ce2c213f9102cfe7e | |
| parent | 21a21b853a1bb606358af61e738abfb9aecbd720 (diff) | |
hw/mips_malta: Fix YAMON API print routine
The print routine provided as part of the in-built bootloader had a bug
in that it attempted to use a jump instruction as part of a loop, but
the target has its upper bits zeroed leading to control flow
transferring to 0xb0000814 rather than the intended 0xbfc00814. Fix this
by using a branch instruction instead, which seems more fit for purpose.
A simple way to test this is to build a Linux kernel with EVA enabled &
attempt to boot it in QEMU. It will attempt to print a message
indicating the configuration mismatch but QEMU would previously
incorrectly jump & wind up printing a continuous stream of the letter E.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
| -rw-r--r-- | hw/mips/mips_malta.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c index 34d41ef44a..e90857ee0b 100644 --- a/hw/mips/mips_malta.c +++ b/hw/mips/mips_malta.c @@ -727,7 +727,7 @@ static void write_bootloader(uint8_t *base, int64_t run_addr, stl_p(p++, 0x00000000); /* nop */ stl_p(p++, 0x0ff0021c); /* jal 870 */ stl_p(p++, 0x00000000); /* nop */ - stl_p(p++, 0x08000205); /* j 814 */ + stl_p(p++, 0x1000fff9); /* b 814 */ stl_p(p++, 0x00000000); /* nop */ stl_p(p++, 0x01a00009); /* jalr t5 */ stl_p(p++, 0x01602021); /* move a0,t3 */ |